Town Hall Address 16 Wallkill Ave. Hamburg, NJ 07419 United States- Sussex County Website http://www.hamburgnj.org County Clerk 973-827-9230 Ext. 4010 16 Wallkill Ave. Hamburg, NJ 07419 United States Assessor 973-827-9230 Ext. 4016 Thursday: 1:00 P.M. - 3:00 P.M. 16 Wallkill Ave. Hamburg, NJ 07419 United States Tax Collector 973-827-9230 Ext. 4011 16 Wallkill Ave. Hamburg, NJ 07419 United States Attorney 973-838-4500 16 Wallkill Ave. Hamburg, NJ 07419 United States Mayor 973-827-9230 Ext. 4010 16 Wallkill Ave. Hamburg, NJ 07419 United States Municipal Court 973-209-4545 11 Orchard St. Hamburg, NJ 07419 United States County Sussex